Electric-electronic device including polyimide thin film
AssigneeKanegafuchi Kagaku Kogyo Kabushiki Kaisha
InventorsMasakazu Uekita, Hiroshi Awaji
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Abstract
An electric-electronic device including a polyimide thin film is disclosed, said polyimide thin film having a thickness of not more than 1000 .ANG. and a dielectric breakdown strength of not less than 1.times.10.sup.6 V/cm. The device has excellent performance properties ascribed to high heat resistance, mechanical strength, chemical resistance and insulating properties of the polyimide thin film.
Claims7
An electric-electronic device comprising a heat-resistant polyimide thin film formed by a Langmuir-Blodgett method and having a thickness of not more than 1000 .ANG. , and a dielectric breakdown strength of not less than 1.times.10.sup.6 V/cm.
An electric-electronic device comprising a polyimide thin film obtained by building up a film of an amphiphilic polyimide precursor on a substrate by a Langmuir-Blodgett process and imidizing the built-up film, wherein said amphiphilic polyimide precursor is represented by formula (I) ##STR42## wherein R.sup.1 is a tetravalent group having at least 2 carbon atoms, R.sup.2 is a bivalent group having at least 2 carbon atoms, and each of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is independently selected from the group consisting of:
- (1) hydrogen atom;
- and
- (2) a monovalent group having 1 to 30 carbon atoms selected from the group consisting of an aliphatic group, an alicyclic group, an aromatic group, a group in which an aliphatic group is combined with an aromatic group, a group in which an aliphatic group is combined with an alicyclic group, said monovalent group being unsubstituted or substituted by a halogen atom, nitro group, amino group, cyano group, methoxy group or acetoxy group, provided that at least one of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 has at least 12 carbon atoms, wherein said polyimide thin film has a thickness of not more than 1000 .ANG. and a dielectric breakdown strength of not less than 1.times.10.sup.6 V/cm.
Dependencies are inferred from the claim text.